Internal combustion engine

Abstract

An internal combustion engine with at least one control element for variation of the flow cross-section of a charge exchange passage, which control element is automatically adjustable in accordance with the engine mode by means of an actuating member and a connecting element. In order to permit automatic adjustment of the control element in dependence of engine speed and load in a simple manner, the internal combustion engine be flexibly supported in a frame, and that the actuating member of the control element be supported via the connecting element on at least one pivot fixed in the frame, such that the control element can adjust itself with increasing torque, due to the relative movement between engine and frame resulting from the torque of the combustion engine, thereby increasing the flow cross-section of the charge exchange passage while varying the beginning of the charge changing process.

What is claimed is:  
     
       1. An internal combustion engine with at least one control element for variation of a flow cross-section of a charge exchange passage, which control element is automatically adjustable in accordance with the engine mode by means of an actuating member and a connecting element, wherein the internal combustion engine is flexibly supported in a frame, and the actuating member of the control element is supported via the connecting element on at least one pivot fixed in the frame, such that the control element can adjust itself with increasing torque, due to the relative movement between engine and frame resulting from the torque of the combustion engine, thereby increasing the flow cross-section of the charge exchange passage while varying the beginning of the charge changing process. 
     
     
       2. The internal combustion engine according to  claim 1 , wherein the connecting element is formed by a rod or linkage. 
     
     
       3. The internal combustion engine according to  claim 1 , wherein the control element is formed by a flap turning about an edge or a central axis. 
     
     
       4. The internal combustion engine according to  claim 1 , wherein a first control element is provided in at least one charge exchange passage configured as an exhaust passage, said control element being actuated by supporting it on a pivot fixed inside the frame. 
     
     
       5. The internal combustion engine according to  claim 1 , wherein a second control element is provided in at least one charge exchange passage configured as an intake passage, said control element being actuated by supporting it on a pivot fixed inside the frame. 
     
     
       6. The internal combustion engine according to  claim 1 , the engine operating on the two-stroke cycle and at least one charge exchange passage being configured as a transfer passage, wherein a third control element is provided in the at least one charge exchange passage configured as a transfer passage, which is also actuated by supporting it on a pivot fixed in the frame. 
     
     
       7. The internal combustion engine according to  claim 1 , the engine operating on the two-stroke cycle and the exhaust passage or intake passage being controlled by a piston, wherein the control element is capable of varying the flow cross-section of the exhaust passage or the intake passage in the direction of the cylinder axis. 
     
     
       8. The internal combustion engine according to  claim 7 , wherein the first control element configured as a one-sided flap is held at the top side of the exhaust passage next to a top of a combustion chamber. 
     
     
       9. The internal combustion engine according to  claim 7 , wherein the second control element configured as a one-sided flap is held at a bottom side of the intake passage distant from the top of the combustion chamber. 
     
     
       10. The internal combustion engine according to  claim 1 , wherein the engine operates on the four-stroke cycle.